<template>
  <nav-bar>
    <div slot="left" class="back" @click="goBack">
      <img src="~assets/img/common/back.svg" alt="">
    </div>
    <div slot="center" class="title">
      <div v-for="(item,index) in titles"
           :key="index"
           class="title-item" :class="{active : index === currentIndex}"
           @click="titleClick(index)">{{item}}</div>
    </div>
  </nav-bar>
</template>

<script>
  import NavBar from "components/common/navbar/NavBar";
  export default {
    name: "DetailNavBar",
    components: {
      NavBar
    },
    data() {
      return {
        titles: ['商品', '参数', '评论', '推荐'],
        currentIndex: 0
      }
    },
    methods: {
      titleClick(index) {
        this.currentIndex = index;
        this.$emit('titleClick', index)
      },
      goBack() {
        this.$router.back()
      }
    }
  }
</script>

<style scoped>
 .title {
   display: flex;
   font-size: 13px;
 }
 .title-item{
   flex: 1;
 }
  .active {
    color: var(--color-high-text);
  }
  .back img{
    vertical-align: middle;
  }
</style>
